Friction-clutch.



No. 709,9I8. Patented Se'pt. 3Q, I902.

A. MILL. FRICTION CLUTCH.

' (Application filed Dec. I5, 1901.)

(N0 Mode'l.)

' UNITED STATES I PATENT OFFICE.-

ANTON MILL, OF CINCINNATI, OHIO, ASSIGNOR TO THE AMERICAN TOOL WORKSCOMPANY, OF CINCINNATI, OHIO, ACORPORATION OF WEST VIRGINIA.

FRICTION-CLUTCH.

SPECIFICATION forming part of Letters-Patent No, 709,918, datedSeptember 30, 1902.

Application filed December 5.' 1901. Serial No. 84,844. (No model.)

a clutch capable of instant and efiective ac-,

tion and of great power in comparison with the size of the same and ofsimple construc tion and easy manipulation; and 1 my invention consistsin providing opposing concentric friction-faces facing each other and adoublebanded clutch between them and a rock-shaft and key with wings forthe key, all having a common longitudinal axis between the bands androcking on that longitudinal axis, and

thereby forcing the two bands of the clutch,

one longitudinally and outwardly and the other longitudinally andinwardly, for causing uniform engagement between the rings and the saidfriction-faces throughout their length for together forming a clutchmechagency to be moved.

In the drawings, Figure 1 represents an end elevation of my improveddevice with the cone omitted. Fig. 2 is a cross-section of the same,taken on a line corresponding to the line a: a; of Fig. 3. Fig. 8 is avertical central longitudinal section of w the same, taken on the line yy of Fig. 2. spective View of the rock-key and attached rock-arm. Fig. 5is a side elevation of the friction-rings, andFig. 6 is a verticalcentral longitudinal-section showing a modification in construction.

A represents the driving -shaft. sleeve splined thereto journaled in abearing C. In the form shown the bearing and sleeve are held againstrelative longitudinal movement by shoulders I). A flanged collar D has ahub 01 surrounding the sleeve, to which it is secured, as by means ofscrews 01.

E is a hub provided with a groove 6 for forming two oppositely arrangedfriction- I faces (2 6 A bevel-gear F or other motion receiving orimparting device may be secured anism between the moving agency and theFig. 4 is a per- Bisa to the hub, as by means of screws f, or, ifdesired, the hub may be made integral with the motion receiving orimparting device, as indicated in Fig. 6, in which the pulley X isindicated as projecting from the hub. The gear F is shown as meshingwith a gear at on an upright shaft N. The friction-faces e e are engagedby a plurality of friction-rings G G, shown as secured to the flange dof the collar D by pin H. In this manner inner and outer concentricfriction-faces engaged by inner and outer bands or split rings areformed. The friction-rings are held fixedly to the flanged collar bysuitable means, as by the pin H, as shown in Fig. 2, where the rings areshown asintegral at their pinned end, connected by a web g with thefriction-ring members extending from the web and held by a single pin.The friction-ring members may be made integral with the flange of thecollar, if desired, the pin being then omitted. The friction-rings areprovided, respectively, with engaging faces g g against which a suitablekey I is adapted to take for contracting the one and expanding theother, preferably simultaneously. The key I rocks in a bearing 61, inthe flange (V. The end of the band G constitutes engaging face 9', andthe engaging face g is formed on a lug g at the end of the friction-ringG. The keyis shown as comprising a pin or rockshaft 2', which forms thejournal for the key and rocks in the bearing (i and wings c" and tA'rock-arm K is secured to the key, and a cone L, having coned face Z,forces the rockarm about its fulcrum for causing the friction-bands toengage with their faces, and thus operatively uniting the driving andthe driven'agencies. The friction-rings have resilient properties, andtheir resiliency is employed for acting in connection with the key forcausing engagement with the frictionfaces. The rock-arm K may beprovided with an adjusting-bolt k for regulating the degree offrictional contact between the rings and the frictionsurfaces. Therock-arm K is caused to move by a relative movement longitudinallybetween the collar and rock-arm. The friction rings may be provided withfibrous or other friction coverings g 9 suitably secured thereto. Ashifter-arm l takes about the cone L and is held thereon by a collar ZIn Fig. 6 Ihave shown myimproved device as applied to a pulley and havealso in that figure shown a modification in construction. Thus a flangedcollar D may be directly secured to the shaftAand the groove provided inthe pulley, the pulley being loose with relation to the shaft when theclutch is unengaged and being secured thereto when the clutch mechanismis operated for that purpose. It is obvious also that the frictionringsmay be secured to the moving member or the sequence of motion reversed,or other changes made in construction without departing from the spiritof my invention.

I claim- 1. The combination of a revoluble agency, a pair ofoppositely-arranged concentric friction-faces facing each other, andoppositelyarranged friction-ring members, with a rockpin having wingsthereon engaging said friction-ring members and rocking about an axislocated between said friction-ring members, and means for rocking saidpin thereby causing one of the friction-ring members to be pressedlongitudinally and inwardly and the other to be pressed longitudinallyand outwardly into frictional engagement with said faces.

2. The combination of a plurality of friction-faces concentric with theaxis of a revolving agency one of which faces outwardly from and theother in wardy toward said axis and toward each other, with expandingand contracting ring members for said faces, a rock-key having wingsintegral therewith and rocking therewith about a common axis locatedbetween said members and means for rocking said key thereby causingengagement of said ring members with said faces by having said wingspress said rings respectively longitudinally and inwardly andlongitudinally and outwardly by pressure upon the ends of the same,substantially as described.

3. The combination of a revoluble agency, a pair of friction-surfacesfacing respectively inwardly and outwardly with relation to the axis ofthe revoluble agencyand toward each others planes, a pair offriction-rings, one expansibly and the other contractibly arranged forengagement with said frictionsurt'aces, a shoulder for a ring, anengaging face on the other ring, a rock-key and wings thereon having acommon axis located between the planes of said friction-rings forengagement with said shoulder and the engaging face of the other ringand means for rocking said key thereby simultaneously causing frictionalengagement between the friction-rings and said pair offriction-surfaces.

4. The combination of a revoluble agency,

a pair of friction-surfaces concentric therewith and facing each other,a pair of frictionring members between the same, a shaft, a flangedcollar, means for securing the ring members to the flanged collar, ashoulder for aring member, a rock-shaft having wings integral therewithbetween said shoulder and the other ring member, and a rocker-arm secured to said rock-shaft and by its movement causing said wings to moveconcentrically about the axis of the said rock-shaft between the planesof said ring members and thereby engaging said shoulder and the otherring member and means for rocking said rockerarm thereby simultaneouslycausing said members to engage said concentric frictionsurfaces.

5. In a friction-clutch,the combination with a shaft, of a revolubleagency surrounding the shaft and having a pair of friction-surfacesfacing respectively inwardly and outwardly with relation to the axis ofthe revoluble agency and toward each others planes, a pair of splitfriction-rings, one expansibly and the other contractibly arranged forengagement with said friction-surfaces, a contact-face for each ring anda rock-key having a pair of wings arranged to engage said contact-facesand having their axis extending longitudinally of the shaft between theplanes of said friction-rings and arranged to turn on that axis andmeans for rocking said key.

6. In a friction-clutch, the combination of the hub E, thefriction-faces 6' e the split friction-rings G G, the collar D, the keyI having wings 1) t the journal 1' for the key, the bearing (1 on thecollar D in which the journal'i rocks, with the engaging faces g g onthe said friction-rings for engagement by said wings and means forrocking said key, substantially as described.

7. In a friction-clutch,the combination with a shaft, of a collar Dtherefor, a hub E surrounding the shaft, with an annular groove for thehub having therein the friction-faces e e facing each other, thefriction-rings G G between said faces, the rock-key I having wings i iand journal i rocking about a common axis extending longitudinally ofthe shaft between said friction-rings and rocking on that axis forsimultaneously expanding and contracting said friction-rings forsimultaneously respectively increasing and decreasing their diameteruniformly and cansing uniform engagement between said rings and saidfriction faces throughout their length, with a cone on the shaft, and arockarm K for the key for rocking the latter, substantially asdescribed.

8. In a friction-clutch, the combination of two concentric frictionfaces facing each other, and a pair of concentric friction-rings betweenthe same, a rock-pin having engaging faces for the pair offriction-rings, the axis of said rock-pin being between said fric- ICCtion-rings and with the rock-pin and said enname hereto in the presenceof two subscribgaging faces rocking about said axis of said ingwitnesses. rock-pin concentrically and thereby force the friction-ringsinto engagement with said fric- ANTON L 5 tion-faces, and means forrocking the rock Witnesses:

pin. ERNEST G. SIMON,

In testimony whereof I have signed my HERBERT F. HARDEN.

